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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Deferred tax assets:      
Accounts receivable and financing receivables $ 877 $ 625  
Accrued vacation 907 678  
Stock-based compensation 1,909 1,905  
Deferred revenue 1,002 988  
Research expenditures 9,779 0  
Accrued severance 490 44  
Right of use asset 1,848 1,740  
Credits 0 2,472  
Other (93) 15  
Net operating loss 3,738 3,560  
Deferred tax assets 20,457 12,027  
Less: Valuation allowance 604 622 $ 600
Total deferred tax assets 19,853 11,405  
Deferred tax liabilities:      
Intangible assets 20,941 18,002  
Accrued liabilities and other 9,259 4,668  
Fixed assets 527 875  
Right of use liability 1,884 1,740  
Total deferred tax liabilities 32,611 25,285  
Total net deferred tax liability $ (12,758) $ (13,880)